The mechanical properties of UO2 fuel are of great importance to the nuclear engineering community for modeling of fuel performance during operation and accident scenarios. While there is knowledge about the mechanical properties of UO2 at room temperature there exists a need for additional data at elevated temperatures including an understanding of the deformation mechanisms of the fuel at the microscale. Small-scale testing techniques like microcantilever bending and nanoindentation have the ability to measure mechanical properties in-situ allowing observation of the deformation of the material. These techniques can also be used to study mechanical properties of the material at elevated temperatures, which then can subsequently be investigated with other more conventional techniques. In our work we perform microcantilever and nanoindentation testing on UO2 with subsequent TEM investigation to evaluate the deformation mechanisms. In addition we perform in-situ TEM testing on 3 point bend specimens and explore high temperature testing options.